> navigate:  
  Graduate Medical Education


Welcome to the clinical clerkship with the PCOM Department of Ophthalmology.
Program Director: David M. Ringel, D.O.
Co-Program Director: Kenneth C. Heist, D.O.
Course Objectives:
1. Gain perspectives on ophthalmic basic science & clinical ophthalmology.
2. Introduction to the key principles underlying ocular structure, function, and pathology.
3. Practical exposure to ophthalmic disease, patient care, and treatment strategies.
4. Observation of various types of ophthalmic procedures and surgery.
As a student you will, at your own pace, learn to take a focused ophthalmic history, examine patients, and assist with in-hospital consultations. You will also be introduced to ophthalmic surgery, including cataracts, cornea, glaucoma, retina and oculoplastics. This is a "hands on" rotation and we consider our students part of the eye clinic team.
Our residents and attending physicians gather routinely for journal club. Activities at these meetings vary and include case discussions, journal topics, presentation of landmark research publications, and wet labs. Finally, formal lectures occur each morning at Wills Eye Institute. In addition to these formal daily lectures, there is weekly tumor conference and retina imaging conference – also at Wills. Attendance at the Wills Eye Institute conferences is not mandatory but highly recommended. You may wish to preview the lectures held during your rotation by going to www.willseye.org and clicking on the month’s bulletin under CME.  You will have the opportunity to spend a few clinic days at Wills while on rotation with us.
While on our service, you should be motivated to improve your skills in ophthalmic history and examination. Specifically, we want you to learn slit lamp biomicroscopy, direct ophthalmoscopy, indirect ophthalmoscopy, and applanation tonometry. Towards the end of your rotation, we want you to gain enough skill to primarily assess selected outpatients.
We want to engage you not only clinically but academically. Therefore, the student will make one 10–15 minute presentation on the topic of his or her choice to the residents and attending physicians on service. This may be as formal as a PowerPoint lecture or as simple as a discussion with a hand-out. Either way, we just want you to learn.

Your rotation will entail a varied experience with the attendings with whom we rotate. The main preceptor will be Dr. Heist, comprehensive ophthalmologist. He is co-program director. Our other main sites are Lankenau Hospital which provides comprehensive ophthalmology, resident clinic, oculoplastics, neuro-ophthalmology, and retina.  The Moore Eye Institute provides various subspecialties including comprehensive ophthalmology, cornea, glaucoma, retina and pediatrics. There are two other resident clinics in south Philadelphia in which you may attend during your rotation.

The three-year ophthalmology residency program at Philadelphia College of Osteopathic Medicine prepares residents to be confident and well-qualified in both ophthalmologic surgical procedures and ophthalmologic office practice. It is designed so that residents, through comprehensive didactic and clinical training, meet the basic requirements for board certification in ophthalmology.

During internship, the ophthalmology PGY-1 resident spends two full clinical months on the ophthalmology service and is encouraged to participate in resident clinic throughout the year.  A basic science course beginning the first year leads to observation of cases, participation in patient care and review of radiologic films. The first year resident also partakes in the introductory course and a 1 month pathology rotation held at Wills Eye along with the other residencies in the Philadelphia area.  Instrumentation study and wet lab prepare the resident to perform some surgical and laser procedures under supervision.  During the second year, residents see patients in the clinic and gain increasingly varied surgical experience with cataract, cornea and advanced anterior segment surgery, glaucoma, vitreo-retinal surgery, strabismus, blepharoplasty, ptosis repair, ectropion/entropion, lid reconstruction, and orbital surgery for fractures, thyroid disease, tumors and more. 

During the third year, residents are responsible for pre- and post-operative patient care and to expand their surgical knowledge in all the subspecialties mentioned above.  The resident performs surgeries of greater complexity and assists attending physicians on additional cases. Third-year residents are also responsible for training medical students, interns and junior ophthalmology residents in the clinics. 

Program Directors

David M Ringel D.O.
Program Director PCOM Ophthalmology

Kenneth Heist, D.O.
Co-Program Director PCOM Ophthalmology


Current Residents

Douglas Mazzuca Jr D.O.  PGY-4

Douglas Mazzuca Jr. D.O. is the Chief Resident with the Philadelphia College of Osteopathic Medicine.  Originally from Hockessin, DE, Douglas earned a bachelor's degree in mechanical engineering from Villanova University.  After working for a few years in construction and patent law in Washington D.C., Douglas decided to switch career paths and attend medical school.  He graduated from Philadelphia College of Osteopathic Medicine in 2012.  He is currently the Chief Resident and plans to join his father’s ophthalmology practice after graduating.

On his free time Douglas likes skiing, playing tennis, cooking, and "going down the shore" in the summer.


Charisse Chin, D.O, PGY-3

Charisse M. Chin, DO, MPH is the PGY-3 Ophthalmology Resident with the Philadelphia College of Osteopathic Medicine.  She originally hails from Southern California and received her undergraduate degree in Health Promotion and Disease Prevention Studies from the University of Southern California.  Her Master of Public Health degree was obtained from Tulane University School of Public Health and Tropical Medicine.  She worked in both non-profit and private organizations as a Program Director before returning to medical school at A.T. Still University School of Osteopathic Medicine in Mesa, AZ.
Charisse enjoys relaxing with her family, reading, pilates, dance, and going to the beach in her free time.


Bradley O'Neill, D.O., PGY-2

Bradley O'Neill D.O. is the PGY-2 Ophthalmology Resident with the Philadelphia College of Osteopathic Medicine. Originally from Clearwater, FL, he earned his Bachelor's Degree in Biomedical Sciences from the University of South Florida in 2008. Bradley went on to complete his medical training at Lake Erie College of Osteopathic Medicine in Bradenton, FL. Upon graduating from LECOM-Bradenton in 2013, he completed a Transitional Year Residency in Youngstown, OH where he was awarded first place for his research presentation on Vitreomacular Traction at the annual Resident Research Day. In his free time, Bradley enjoys staying active outdoors, cooking, and playing sports.


Remington Horesh, D.O., PGY- 1

Remington Horesh, D.O. is the PGY-1 Ophthalmology Resident with the Philadelphia College of Osteopathic Medicine.  Growing up in sunny South Florida, he earned his Bachelor's Degree in Biotechnology along with a minor in Chemistry from the University of Florida.  He subsequently received his medical degree at Lake Erie College of Osteopathic Medicine's Bradenton campus in 2015.  After hours, Remington spends his time playing music, traveling, and training in the Martial Arts.




Lankenau Hospital

Jacqueline R. Carrasco, M.D., F.A.C.S
Residency Coordinator for Lankenau Hospital
Oculoplastics and Orbital Surgery

Ralph J. DiGiovanni, Jr., M.D.
Lankenau Resident Clinic Director
Comprehensive Ophthalmology

Hugo M. Linares, D.O.

Robert B. Penne, M.D., F.A.C.S.
Oculoplastics and Orbital Surgery

Louis X Santore, M.D.
Chief of ophthalmology Lankenau Hospital
Comprehensive Ophthalmology

Robert C Sergott, M.D.



Moore Eye Institute/Hospital Affiliations

Cynthia Alley, M.D
Residency Coordinator for Moore Eye Institute
Pediatrics and Strabismus Surgery

Nancy Crawford, M.D.
Comprehensive Ophthalmology

Leonard H. Ginsburg, M.D., C.D.E
Founder of Moore Eye

Kenneth C. Heist, D.O.
Co-Program Director
Comprehensive Ophthalmology

Ravi Patel, M.D., M.B.A.
Director of Resident Education at Moore Eye Institute
Cornea/Advanced anterior segment surgery

Deepta Rawat, M.D., M.S.

South Street and Roosevelt Blvd Clinic:

Jurij R. Bilyk M.D.
Oculoplastics and Orbital Surgery

Jennifer K. Hall M.D.

We look forward to getting to know you. Please contact us through the email address below with any questions that you may have or to set up a rotation.

Last Updated: 8/3/15